I will look into these codecs. Are these lame codecs or audacity? I'm running Fedora Core and Slackware Linux.
Some are wondering why I want such a low bit rate. Here's why-I run an mp3 server that streams and sounds best at low bitrates (it's not choppy on low bandwith connections). I have ~ 5000 mp3s and most are speeches. Some were pre-compressed at 24 kbps and 22 khz and sound great. The ones I'm trying to compress with lame are recorded at 192 kbps and 44 khz. So, it's been done and it should work for me. Here are links to 2 speeches: A 24 kpbs 22 khz speech download that sounds fine: http://media.ccphilly.org:81/Teaching/Audio/B02_Exodus/WED54924.mp3 The 192 kpbs 44 khz speech I want to compress: http://www.ccbellmawr.com/radioprogram/Week20070312/SH20070313%20Nehem4_5b.mp3 Marty On Thu, 15 Mar 2007 23:03:47 -0400 "Ishaan Dalal" <[EMAIL PROTECTED]> wrote: Marty, Unfortunately, Lame is known to be not really optimized for low-bitrate encoding. The closest option would be to the Fraunhofer codec at 22 KHz/32 kbps (the ACM codec bundled with Windows can encode at that rate). If it is voice, you should try speech codecs - they will get you much better quality at the kind of bitrates you want. I'd suggest Speex. Are you transcoding? (i.e. you don't have the original 22 KHz/16-bit PCM (WAV) audio, but are using the 192 kbps MP3 as the "source")? Cheers, -Ishaan On 3/15/07, Marty Huntzberry <[EMAIL PROTECTED]> wrote: > > The only effect in audacity and lame that seems to work is reducing the > audio. Why does it sound good in it's original mp3 format of 192 kbps and > 44 > khz but sounds bad at 24 kbps and 22 khz? It's mainly a voice lecture. > > On Thu, 15 Mar 2007 16:12:53 +0530 > "tech list" <[EMAIL PROTECTED]> wrote: > > Marty, unfortunately, there's not much you can do since the recording > itself > was low quality. 22KHz should have been OK for voice, but looks like the > mic > was placed badly > or the acoustics of your room/hall was not the best. > Your best bet would be to forget about lame for the moment and try out > with > some audio > tools like audacity. Keep a copy of the original recording and play around > with some noise > cancellation, filtering etc. to see what sounds best. > > > On 1/24/07, [EMAIL PROTECTED] <[EMAIL PROTECTED]> wrote: > > > > I have a lecture recording (no music, just voice) that was recorded with > a > > digital recorder about 1 foot from the speaker at 22 kHz and 16 bit > > mono. It sounds like the speaker is in a well. Can I clean the > recording > > up a bit with a filter in lame? > > > > Marty > > > _______________________________________________ > mp3encoder mailing list > mp3encoder@minnie.tuhs.org > https://minnie.tuhs.org/mailman/listinfo/mp3encoder > _______________________________________________ mp3encoder mailing list mp3encoder@minnie.tuhs.org https://minnie.tuhs.org/mailman/listinfo/mp3encoder _______________________________________________ mp3encoder mailing list mp3encoder@minnie.tuhs.org https://minnie.tuhs.org/mailman/listinfo/mp3encoder
